Improvement in hot-air furnaces



2 Sheets Sheet GOMMENGINGER & TROTTER Hot Air Furnace.

Patented 0a. 5, 1869.

. jm nib'n-j' adggff w N. PETERS, PHDTO-LHhOGRAFK-CR, WASHING) 2 Sheets-Sheet 2.

GOMMENGINGER & TROTTER Hot Air Furnace.

Patented Oct. 5, 1869.

i 1 l I 9' O A A I I I l n: I p n (10.00am, z ovz a a NPETERS. FHOTO-LITNOGRAFHER, WASHINGTON. D C I dbtiml giant BARTHOLOMEW GOMMENGINGER AND CHARLES W. TROTTER, OF

ROCHESTER, NEW YORK. r

Letters Patent lio. 95,461, dated Octoberii, 1869.

IMPROVEMENT IN HOT-AIR FURNACES The Schedule-referred to in these Letters Patent and making part of the same v To all whom it may concern Be itrknown that we, BARTHOLOMEW Gbmrnx- GINGER and CHARLES W. Tno'rrnn, both of Rochester, county of Monroe, and State of New York, have invented a new and useful Mode in the Construction and Arrangement of Hot-Air-Draught Flues for Furnaces; and we do hereby declare that the following is a full and exact description thereof, reference being had to the annexed drawings, and to the letters of reference marked thereon, in which Figure 1, Plate I, represents a perspective view of a furnace-base,showing fire-pot, ash-pit, and our hot-airdraught flue, c c c.

Figure 2, Plate I, represents a horizontal section .in a plane, just below the grate, showing inside of hot-air draught fine 0 c c, with perforations 'i i i.

Figure 3, Plate II, represents a longitudinal elevation of the fire-pot and ash-pit.

Figure 4, Plate II, represents a transverse section of fire-pot and ash-pit. v

The nature of our invention consists in the arrange ment of draught-fines for furnaces, by which the 'cold air is heated and equally distributed immediately under the grate, before the air connnuni'cates with the fire, and thereby producing perfect combustion witheither wood or coal.

To enable ,others skilled in the art to make or use our inyentiomwe will proceed to describethe construction and operation of the same.

We place in the base or ash-pit of furnaces a double bottom, marked a a, with an opening in front of furnace, and immediately under the ash-pit door.

The opening or space, marked d, is provided with a register, I), asihlly shown in'drawings, figs. 1, 3, and 4.

The space at, between the double bottoms to a, is for the purpose of admitting-cold air to be used for draught, and the amount necessary is regulated by'the register b, in frontof the furnace. I

Two parallel partitions, marked e e'in fig. 2, are

placed between the double bottom a aprunning from the front of register toward'the rear of base, but leaving an open'space between the ends of the partitions e e and base A, as shown in drawing, figs. 2 and 3.

At the junction of the fire-pot B with the ash-pit or base A, and at the upper edge of base A, outside of the same, we place a. perforated flue, c c c.

This flue c c 0 passes all around the upper edge of ash-pit or base A, communicating witlrthe-flue or space (I by two perpendicular air-chambers, marked ff, on both sides of the entrance to ash-pit A, as shown in drawing, figs. 2, 3, and 4,"Plates I and II.

The flue c c c, surrounding the upper edge of ash- 'pit A, hasa number of equally-distributed perforations on the inside of ash-pit, and in'nncdiately under the grate. I

The bottom of ash-pit being intensely heated by the hot ashes and heat from the grate, as also is the upper .part of ash-pit by its contactwith the fire on the grate,

communicates the same intensity of heat to the air in its passage through the fines (1,], and c, to the grate, and thereby demonstrating the fact that the fuel can be made toproducc a much greater and more uniform amountof heat than by admittingcold air direct to the fire.

The door of the ash-pit is made to fit tight when closed.

What we claim as our invention, and desire to sccureby Letters Patent, is-.

The double bottom a a, space or flue I, communicating with perforated flue c c c by two perpendicular air-chambers f j, in. the manner and for the purpose herein specified and set forth.

BARTHOLOMEW GOMB'IEN GINGER. CHAS. W. TROTTER.

Witnesses:

Gno. FRAUENBERGER, O. T. LEADJLEY, 

